Controller for a dual drug delivery system



FIG. 1 is a perspective view of a controller for a dual drug delivery system showing my new design;

FIG. 2 is a right side elevational view of the controller for a dual drug delivery system;

FIG. 3 is a back side elevational view of the controller for a dual drug delivery system; and

FIG. 4 is a bottom plan view of the controller for a dual drag delivery system. 

The ornamental design for a controller for a dual drug delivery system, substantially as shown. 